.login{
  width: 100%;
  height: 100%;
  position: fixed;
  background-color: #f0f2f5;
  .title{
    color: rgba(0,0,0,.85);
    font-weight: 600;
    font-size: 33px;
    text-align: center;
    margin-bottom: 30px;
  }
  .center_box{
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    margin: auto;
    width: 328px;
    height: 400px;
  }
  .login_btn{
    width: 100%;
  }
}